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Open AccessEditor’s ChoiceArticle

An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment

1
Graduate School for Green Transportation, KAIST, Daejeon 34141, Korea
2
Electromagnetic Environment Research, ETRI, Daejeon 34129, Korea
3
Department of Electronic Engineering, University of Suwon, Hwaseong 18123, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Sheldon S. Williamson
Energies 2017, 10(3), 315; https://doi.org/10.3390/en10030315
Received: 2 January 2017 / Revised: 27 February 2017 / Accepted: 2 March 2017 / Published: 7 March 2017
This paper proposes an autonomous coil alignment system (ACAS) for electric vehicles (EVs) with dynamic wireless charging (DWC) to mitigate the reduction in received power caused by lateral misalignment between the source and load coils. The key component of the ACAS is a novel sensor coil design, which can detect the load coil’s left or right position relative to the source coil by observing the change in voltage phase. This allows the lateral misalignment to be estimated through the wireless power transfer (WPT) system alone, which is a novel tracking method for vehicular applications. Once misalignment is detected, the vehicle’s lateral position is self-adjusted by an autonomous steering function. The feasibility of the overall operation of the ACAS was verified through simulation and experiments. In addition, an analysis based on experimental results was conducted, demonstrating that 26% more energy can be transferred during DWC with the ACAS, just by keeping the vehicle’s load coil aligned with the source coil. View Full-Text
Keywords: electric vehicle (EV); dynamic wireless charging (DWC); wireless power transfer (WPT); power degradation; coil misalignment; magnetic sensing electric vehicle (EV); dynamic wireless charging (DWC); wireless power transfer (WPT); power degradation; coil misalignment; magnetic sensing
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MDPI and ACS Style

Hwang, K.; Cho, J.; Kim, D.; Park, J.; Kwon, J.H.; Kwak, S.I.; Park, H.H.; Ahn, S. An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment. Energies 2017, 10, 315. https://doi.org/10.3390/en10030315

AMA Style

Hwang K, Cho J, Kim D, Park J, Kwon JH, Kwak SI, Park HH, Ahn S. An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment. Energies. 2017; 10(3):315. https://doi.org/10.3390/en10030315

Chicago/Turabian Style

Hwang, Karam; Cho, Jaeyong; Kim, Dongwook; Park, Jaehyoung; Kwon, Jong H.; Kwak, Sang I.; Park, Hyun H.; Ahn, Seungyoung. 2017. "An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment" Energies 10, no. 3: 315. https://doi.org/10.3390/en10030315

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